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#pragma once
/**
@file
@brief 192/256-bit additive homomorphic encryption by lifted-ElGamal
@author MITSUNARI Shigeo(@herumi)
@license modified new BSD license
http://opensource.org/licenses/BSD-3-Clause
*/
#include <mcl/elgamal.hpp>
#include <mcl/ecparam.hpp>
#include <mcl/random.hpp>
namespace mcl {
#ifdef MCL_USE_AHE192
namespace ahe192 {
const mcl::EcParam& para = mcl::ecparam::NIST_P192;
typedef mcl::FpT<mcl::FpTag, 192> Fp;
typedef mcl::FpT<mcl::ZnTag, 192> Zn;
typedef mcl::EcT<Fp> Ec;
typedef mcl::ElgamalT<Ec, Zn> ElgamalEc;
typedef ElgamalEc::PrivateKey SecretKey;
typedef ElgamalEc::PublicKey PublicKey;
typedef ElgamalEc::CipherText CipherText;
static inline void initAhe()
{
Fp::init(para.p);
Zn::init(para.n);
Ec::init(para.a, para.b);
Ec::setIoMode(16);
Zn::setIoMode(16);
}
static inline void initSecretKey(SecretKey& sec)
{
const Ec P(Fp(para.gx), Fp(para.gy));
sec.init(P, Zn::getBitSize(), mcl::getRandomGenerator());
}
} //mcl::ahe192
#endif
#ifdef MCL_USE_AHE256
namespace ahe256 {
const mcl::EcParam& para = mcl::ecparam::NIST_P256;
typedef mcl::FpT<mcl::FpTag, 256> Fp;
typedef mcl::FpT<mcl::ZnTag, 256> Zn;
typedef mcl::EcT<Fp> Ec;
typedef mcl::ElgamalT<Ec, Zn> ElgamalEc;
typedef ElgamalEc::PrivateKey SecretKey;
typedef ElgamalEc::PublicKey PublicKey;
typedef ElgamalEc::CipherText CipherText;
static inline void initAhe()
{
Fp::init(para.p);
Zn::init(para.n);
Ec::init(para.a, para.b);
Ec::setIoMode(16);
Zn::setIoMode(16);
}
static inline void initSecretKey(SecretKey& sec)
{
const Ec P(Fp(para.gx), Fp(para.gy));
sec.init(P, Zn::getBitSize(), mcl::getRandomGenerator());
}
} //mcl::ahe256
#endif
} // mcl
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